Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-29
J.Phys.Conf.Ser.259:012075,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 3 figures, Talk presented at PASCOS, Valencia, 19-23 July 2010
Scientific paper
10.1088/1742-6596/259/1/012075
Thermal leptogenesis and supergravity are attractive scenarios for physics beyond the standard model. However, it is well known that the super-weak interaction of the gravitino often leads to problems with primordial nucleosynthesis in the standard scenario of matter parity conserving MSSM + three right-handed neutrinos. We will present and compare two related solutions to these problems: 1) The conflict between BBN and leptogenesis can be avoided in presence of a hidden sector with light supersymmetric particles which open new decay channels for the dangerous long-lived particles. 2) If there is a condensate in the hidden sector, such additional decay channels can be alternatively opened by dynamical breaking of matter parity in the hidden sector.
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